remcos | 779605a717a75905d70a752b8199f26598079a9cefaa4ee1768cf1083712f47e

Analysis

max time kernel
90s
max time network
16s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
23-11-2024 14:45

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General

Target

$PLUGINSDIR/awjx.dll
Size

20KB
MD5

213e480b87636c56a73a61de53f0c3c8
SHA1

0425ea30b6ae2eca54a8e55e1b7950dc0f5c1412
SHA256

f8c73afa54aeed213fe0f60b0f3fd7e95ad292941a1dcd7cb9d94dc3b0571637
SHA512

7b326838f0a8a214a932f58c66a37b0d6c7972e0ec089f7528c34041b8891c4a4b71d99d7630ff5c4bcbca83cd2aa25b4e8da30bdb1755339aa7ee5d079a4d34
SSDEEP

384:1MO3lld/IM9avqotPg761Zl4ODA23hN28BfYe:1v3lldQM9Gg21oOpzdV

Score

10^/10

remcos discovery rat

Malware Config

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2532 set thread context of 2964	2532	rundll32.exe	31

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dw20.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2744 wrote to memory of 2532	2744	rundll32.exe	30
PID 2744 wrote to memory of 2532	2744	rundll32.exe	30
PID 2744 wrote to memory of 2532	2744	rundll32.exe	30
PID 2744 wrote to memory of 2532	2744	rundll32.exe	30
PID 2744 wrote to memory of 2532	2744	rundll32.exe	30
PID 2744 wrote to memory of 2532	2744	rundll32.exe	30
PID 2744 wrote to memory of 2532	2744	rundll32.exe	30
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2532 wrote to memory of 2964	2532	rundll32.exe	31
PID 2964 wrote to memory of 1780	2964	rundll32.exe	32
PID 2964 wrote to memory of 1780	2964	rundll32.exe	32
PID 2964 wrote to memory of 1780	2964	rundll32.exe	32
PID 2964 wrote to memory of 1780	2964	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\awjx.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2744
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\awjx.dll,#1
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2532
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\awjx.dll,#1
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2964
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
      dw20.exe -x -s 436
      4⤵
      System Location Discovery: System Language Discovery
      PID:1780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1780-7-0x0000000000530000-0x0000000000531000-memory.dmp

Filesize
4KB

Download
memory/2532-0-0x0000000074B85000-0x0000000074B87000-memory.dmp

Filesize
8KB

Download
memory/2964-6-0x0000000074B80000-0x0000000074B83000-memory.dmp

Filesize
12KB

Download
memory/2964-5-0x0000000000400000-0x0000000000488000-memory.dmp

Filesize
544KB

Download
memory/2964-3-0x0000000000400000-0x0000000000488000-memory.dmp

Filesize
544KB

Download
memory/2964-1-0x0000000000400000-0x0000000000488000-memory.dmp

Filesize
544KB

Download
memory/2964-8-0x0000000000400000-0x0000000000488000-memory.dmp

Filesize
544KB

Download